Factors affecting the occurrence and activity of clouded leopards, common leopards and leopard cats in the Himalayas


Clouded leopards are one of the least known of larger felids and were believed to be extinct in Nepal until 1987. They are particularly interesting because their Asian range spans a diversity of habitats in the fastest disappearing forests in the world and encompasses a guild which differs in composition from place to place. As a part of a wider camera-trapping study of this guild, involving 2948 camera traps at 45 sites in nine countries, and paralleling a similar study of the Sunda clouded leopard including a further 1544 camera traps spanning 22 sites distributed across two countries, we deployed 84 pairs of camera traps for 107 days in 2014 and 2015 at Langtang National Park, Nepal between 1823 and 3824 m a.s.l. within a grid encompassing c. 120 km2. We documented the presence of clouded leopards for the first time at an altitude as high as 3498 m a.s.l. Naïve occupancy for clouded leopard was 8.6% (correcting for detection, 10.1%). Clouded leopards were least active in the middle of the day, and largely crepuscular and nocturnal, as were the common leopards and leopard cats. The peak of clouded leopard activity overlapped with that of musk deer. Prey species for both clouded leopard and common leopard were available across the elevation range studied although the availability of some prey species declined as elevation increased, whereas Himalayan serow, Himalayan goral, and musk deer showed no association with elevation. Before this study, there was no hard evidence that clouded leopards occurred above 2300 m a.s.l., having documented them at almost 4000 m a.s.l. in the Himalayas, we emphasise the importance of this extreme portion of the species’ range where climate is likely to change more rapidly and with greater consequences, than the global average. The discovery of clouded leopards in Langtang National Park considerably extends their known range, and raises the possibility that they occur from the Terai in southern Nepal up to the Nepal-Tibet (China) border in the north. Insofar as this study has extended the known extreme boundary of the clouded leopard’s geographic range to encompass Langtang National Park in the Nepali Himalayas.


The edges of species distributions are often determined by tolerances to environmental extremes (e.g., tolerance to cold or aridity) (Easterling et al. 2000). The mainland clouded leopard, Neofelis nebulosa has not hitherto been recorded above 2300 m a.s.l., elevations achieved at the western extent of its geographic range in Nepal (Dinerstein and Mehta 1989; Ghimirey and Acharya 2018). Clouded leopards are amongst the least known of larger felids, and are particularly interesting because their expansive Asian range spans a diversity of habitats and encompasses a guild, differing in composition from place to place, of up to nine different felids, living in the fastest disappearing forests in the world (Miettinen et al. 2011). Before this study, there was no hard evidence that clouded leopards occurred above 2300 m a.s.l. Having now documented them at almost 4000 m a.s.l. in the Himalayas, we emphasise the importance of this extreme portion of the species’ range where climate is likely to change more rapidly and with greater consequences, than the global average (Loarie et al. 2009; Sharma et al. 2009). The mean annual temperature is projected to increase on average by 2.9 °C in just 33 years and up to 4.3 °C in 83 years (Sharma et al. 2009). Climate change affects the distributions and interactions of species with ecosystem scale consequences (e.g. Hersteinsson and Macdonald 1992; Lovari et al. 2013; Elsen and Tingley 2015), which, especially in the case of top predators, are likely to have cascading effects (Ripple et al. 2014; Sandom et al. 2017). This study is part of a wider, camera-trapping study of this guild, involving 2948 camera traps at 45 sites in nine countries (Macdonald et al. in review), and paralleling a similar study of the Sunda clouded leopard, Neofelis diardi, including a further 1544 camera traps spanning 22 sites distributed across two countries (Macdonald et al. in prep.). Insofar as this study has extended the known extreme boundary of the clouded leopard’s geographic range to encompass Langtang National Park, we thereby identify an ideal place to examine the interaction between intra-guild competition and prey availability in extreme environmental conditions.

In 1976 Langtang National Park became the first protected area in the Nepali Himalayas (Fig. 1), covering a core area of 1710 km2 with a 420 km2 buffer zone along the Nepal–China border (DNPWC 2017), and coinciding with an international illegal wildlife trade route (BBC 2008; WWF 2013) (For detailed information on the park, reader can refer to: http://www.langtangnationalpark.gov.np/index.php/component/content/article/2-uncategorised/11-langatang-description). Clouded leopards were even believed to be extinct in Nepal until 1987 (Dinerstein and Mehta 1989). Our attention was attracted to Langtang National Park by rumours of a clouded leopard sighting in the late 1970s in the park (Borradaile et al. 1977; Green 1981).

Fig. 1

Views of the study site as seen from the International Space Station (photograph on the left, source: NASA) and from the ground (photograph on the right, by Özgün Emre Can)

The presence of other guild members is likely to affect the ecology of clouded leopards and thus inter-specific competition. Intra-guild hostility is commonplace amongst the Carnivora, and specifically amongst sympatric felids (Palomares and Caro 1999; Donadio and Buskirk 2006; Macdonald et al. 2010). Felids both larger and smaller than clouded leopards occur at Langtang National Park, namely common leopards (they are larger than clouded leopards), Panthera pardus, and leopard cats, Prionailurus bengalensis, and jungle cats, Felis chaus. Therefore while seeking the presence of clouded leopards, with the aim of identifying corollaries of their distribution, we report similar information for these two sympatric species. The major goals of our study were to identify the predictors of felid presence (in terms of prey and environmental variables), and to explore daily activity patterns in order to shed light on possible intra-guild interactions among the three felid species.


Between December 2014 and February 2015, we established 84 camera trap stations at Langtang National Park, Nepal (Fig. 1). Each station comprised a pair of camera traps placed facing each other (Cuddeback Attack IR). The stations were between 1823 and 3824 m a.s.l. and within a grid encompassing c. 120 km2 as calculated from Google Earth. Each station was placed on animal trails and paths where possible. The distance between stations varied between 0.5 and 1.5 km. The stations were configured in a grid pattern following protocols established in our broader study (e.g. Hearn et al. 2016, 2017; Naing et al. 2017; Singh and Macdonald 2017; Tan et al. 2017), and their locations were logged using hand-held GPS units. Cameras, with the exception of those temporarily inaccessible during extreme weather, were checked weekly to replace batteries and download images. We excluded data derived from cameras not functioning properly (due to for example camera failure, battery failure and heavy snow fall). The number of camera stations used was 81, following the removal of three stations for these reasons. The survey duration was 107 days generating 6591 camera trap days in total (a single trap day is a day when at least one camera was functioning at a station).

To investigate covariates potentially associated with habitat use, we used R software (R Core Team (2017), and specifically the package ‘unmarked’ for occupancy analysis (Fiske and Chandler 2011), allowing for imperfect detection (Kéry and Royle 2015). For each camera station, we created detection histories for the three felid predators (1 for detected, 0 for not detected). The data were collapsed into intervals of different lengths of multiple-day sampling occasions. Models were fitted for intervals of 7, 10, 12, 15 and 20 days. Tests of the goodness of fit of models showed that 20 day occasions gave the best fit using the c-hat (ĉ) statistic based on the frequency of different detection patterns (MacKenzie and Bailey 2004); c-hat values were no higher than 1.2 for any model using this interval. Goodness of fit tests were applied with the randomisation procedure executed with the mb.gof.test command of the AICcmodavg package (Mazerolle 2017). There was no evidence that outputs were, over the range explored, sensitive to the length of sampling occasion. This gave capture history matrices with a maximum of six occasions (for those stations where at least one camera was functioning on all six occasions). The number of days when at least one camera was functioning during each occasion was used as an observation-level covariate in all models. The R package camtrapR (Niedballa et al. 2017) was used to create both detection histories and camera operation matrices.

Global models for each felid were defined by identifying a suite of plausible predictors using a priori biological criteria, as recommended by Anderson (2008), and avoiding the deprecated ‘all possible models approach’. The response variable of interest in all occupancy models was the probability that the habitat associated with a camera station was used by any individual of the species concerned. The predictor variables in the model were metrics of prey availability, human activity and altitude. For the clouded leopard, we considered five categories of putative prey: (i) red muntjac (Muntiacus vaginalis), (ii) wild boar (Sus scrofa), (iii) other ungulates (Himalayan serow (Capricornis thar), Himalayan goral (Naemorhedus goral) musk deer (Moschus chrysogaster)), (iv) primates (Nepal grey langur (Semnopithecus schistaceus) and Assam macaque (Macaca assamensis)), and (v) the Malayan porcupine (Hystrix brachyura) and medium-sized ground-dwelling birds. When grouping the prey species into classes, we considered the average weight of each species and the number of camera trap records for each species. Of these, categories i–iv were used for the common leopard. The likely prey of leopard cat, small rodents, were not detected by our camera traps. For each prey category, and for signs of humans (people or domestic stock), an index was calculated as the percentage of days a camera station was operating where any images of that category were recorded. Elevation was included as an additional covariate. Prevalence of the larger cats (common leopard and clouded leopard), i.e. the proportion of days at each station where either species was recorded, was used as a plausible effect on the activity of the leopard cat. All predictors were standardised. Moderate levels of intercorrelation were observed (Supplementary Material Table 1); in particular, several prey species tended to be more prevalent at lower elevations. Campbell (2000) observed that the reserve was originally planned to be as free as possible from human interference, but that restrictions on human use may not be rigidly enforced. We therefore included an index of human activity in our models as a possible influence on felid behaviour.

The best-supported model was identified by selecting the model with the lowest AICc value and highest model weights (Anderson 2008) where higher model weights indicate a better fit of the model to the data, taking account of parsimony and the number of parameter estimates included. Where no model was dominant, a model was selected if it was a nested version of a more complex model which did not differ by more than 2.0 AICc units, the ‘pretending variable’ issue (Richards 2005), or where the confidence intervals for parameter estimates for additional terms in the more complex model clearly included zero (Anderson 2008). The R package MuMin (Barton 2016) was used to calculate AICc values and model weights for all models nested in the global occupancy model. Interaction terms were not considered, and the effect of sampling effort (camera operation) was included as part of the detection function in all models.

Activity patterns were explored using kernel density estimation for the diel pattern in image records as applied with the activityDensity command of the camtrapR package (Niedballa et al. 2017). This fits an activity curve as a function of the frequency of images at different times of day. Overlaps in felid activity were calculated using the method of Ridout and Linkie (2009) applied with the activityOverlap command in the same package. The coefficient of overlap is denoted by “Dhat1” values, ranging between zero (no overlap) and 1.0 (complete overlap). Relationships between prey species and elevation were explored with normal errors polynomial models.


Discovery of clouded leopards in Langtang National Park

From the 21 images that featured clouded leopards, we documented the presence of three different clouded leopards (Fig. 2), of which the highest was photographed at 3498 m a.s.l. The highest elevation leopard cat was detected at 3824 m a.s.l. We also documented jungle cat (Felis chaus), large Indian civet (Viverra zibetha), and Malayan porcupine (Fig. 2).

Fig. 2

Selected camera trap images of clouded leopard (a), common leopard (b), jungle cat (c), large Indian civet (d), Malayan porcupine (e) and leopard cat (f) documented by the camera trapping survey in Langtang National Park, Nepal

Predicted habitat use of clouded leopard, common leopard and leopard cat

Detections varied substantially among the three felid species. Naïve occupancy (the proportion of sites where at least one detection was recorded) for clouded leopard was 8.6% (correcting for detection, 10.1%), and for common leopard 23.5% (correcting for detection, 32.1%). For leopard cat, naïve detection was 45.7%, and 50.6% correcting for detection.

Investigating the influence of environment, prey, and intra-guild competition on clouded leopards, we found only weak evidence for any effect of the potential predictors of habitat use. The null model (the model including only an intercept term, and no covariates) had the lowest AICc value, (Supplementary Material Table 2), which is unsurprising given that the species was detected at few sites.

The best model for common leopard habitat use included a single, significant predictor variable: muntjac prevalence. Habitat use was higher where muntjac were more prevalent (Fig. 3a, parameter estimate = 8.43, SE = 4.36, P = 0.053). For the leopard cat, the best model included the other two cats and human activity. Leopard cat habitat use was highest where the other cat species and humans were the most prevalent (Fig. 3 b, d, parameter estimates 1.23 SE = 0.60, P = 0.04 and 1.38, SE = 0.72, P = 0.04, respectively).

Fig. 3

Predicted habitat use of common leopard (a), leopard cat (b and d) and clouded leopard (c) in Langtang National Park, Nepal

Prey species

Prey species for both clouded and common leopard were available across the study area. The naïve occupancy estimates for potential prey species were: red muntjac—74.1% (2762 individual images); wild boar—44.4% (245 individual images); Himalayan Serow—28.4% (80 individual images); Himalayan Goral 19.8% (127 individual images); musk deer 28.3% (81 individual images); Nepal grey langur 51.9% (1847 individual images); Assam macaque 11.1% (165 individual images); Malayan porcupine 38.3% (220 individual images). But whereas the availability of some prey species declined as elevation increased (Fig. 4), others (Himalayan serow, Himalayan goral, and musk deer) showed no association with elevation.

Fig. 4

The relationship between abundance and elevation for potential clouded leopard prey (lines fitted with GAM option of R ggplot2, P values are for quadratic term in normal errors model)

Activity patterns of clouded leopard, common leopard and leopard cat

While the overall activity patterns were similar, we observed some evidence for partitioning in patterns of activity among the three felid species. Common leopards were active throughout the day and night, with decreased activity between mid morning and early afternoon. In contrast, clouded leopards were active between early evening (7 pm) and 5 am (Fig. 5a and b). Leopard cats were most active during the evening and early in the night (Fig. 5c). While both clouded leopards and leopard cats were more active in mid to late evening when common leopards were least active (Fig. 5d and e), leopard cats were more active than clouded leopards (and common leopards) in late evening (Fig. 5f). The overlap of activity between common and clouded leopards was similar (Dhat1 value is 0.82) to that observed between leopard cats and clouded leopards (Dhat1 value is 0.79), both were higher than that between leopard cats and common leopards (Dhat1 value is 0.67) (Fig. 5d–f). When human activity is higher than a density value of 0.04, the activity of both common and clouded leopards show low points (Fig. 5g and h), whereas that of leopard cats is lowest when human activity is below 0.02 (Fig. 5g–i).

Fig. 5

Activity patterns of common leopard (a), clouded leopard (b), leopard cat (c); overlap in the activity patterns of the three species (d); common leopard vs. clouded leopard (e); leopard cat vs. common leopard (f); leopard cat vs. common leopard), and human activity versus common leopard (g), common leopard (h), and leopard cat (i)

Activity patterns of potential principal prey species of clouded leopard and common leopard

Clouded leopard activity (Fig. 5b) overlapped with that of musk deer (Fig. 6c, Dhat1 = 0.76) and much less with that of red muntjac (Fig. 6e, Dhat1 = 0.43), Nepal grey langur (Fig. 6f, Dhat1 = 0.17), Assam macaque (Fig. 6g, Dhat1 = 0.09) and medium sized ground birds (Fig. 6i, Dhat1 = 0.25). Common leopard activity (Fig. 5a) overlapped with that of wild boar (Fig. 6d, Dhat1 = 0.51), musk deer (Fig. 6c, Dhat1 = 0.71) and with red muntjac (Fig. 6e, Dhat1 = 0.54). While the peak of common leopard activity was clearly distinct from that of both Himalayan serow and Himalayan goral, overall overlap was high (Fig. 6a, Dhat1 = 0.74; Fig. 6b, Dhat1 = 0.62). Nepal grey langur (Fig. 6f) and Assam macaque (Fig. 6g) were most active between early morning and late afternoon when common leopards (Fig. 5a) were least active (Dhat1 values of 0.27 and 0.15 respectively).

Fig. 6

Activity patterns of the potential principal prey species for clouded and common leopard: Himalayan serow (a), Himalayan goral (b), musk deer (c), wild boar (d), red muntjac (e), Nepal grey langur (f), Assam macaque (g), Malayan porcupine (h), and medium sized ground birds (i)

Medium-sized ground birds (Fig. 6i) were most active between 6 am and 6 pm when leopard cat (Fig. 5c) were less active (Dhat1 = 0.11). While the peak activity times of Himalayan goral (Fig. 6b) and Himalayan serow (Fig. 6a) were distinct, they were also active to some degree around the clock, and at the same time outside of peak activity (Dhat = 0.7). Similarly, Himalayan goral (Fig. 6b) and red muntjac (Fig. 6e) were most active when musk deer (Fig. 6c) were least active so their overall overlap was moderate (Dhat = 0.60 and 0.39 respectively).

Nepal grey langur (Fig. 6f), Assam macaque (Fig. 6g) and medium-sized ground birds (Fig. 6i) were diurnal. Red muntjacs were also mostly diurnal (Fig. 6e). Wild boars were mostly active between early morning and late evening. Musk deer and Malayan porcupine were active from the sunset to sunrise period.


Although fewer than 100 clouded leopards were thought to occur in Nepal (Jnawali et al. 2011), their discovery in Langtang National Park considerably extends their known range, and raises the possibility that they occur from the Terai in southern Nepal up to the Nepal–China border in the north. If our study area were to be representative of the park, then a tentative extrapolation would suggest that there are approximately 40 individuals present in the Langtang National Park alone. Our observations also extend the IUCN Red List global distribution maps for the jungle cat (Felis chaus), large Indian civet (Viverra zibetha) and Malayan porcupine (Hystrix brachyura) (Lunde et al. 2008; Gray et al. 2016; Timmins et al. 2016).

Langtang National Park extends the known range of clouded leopards. The site has highly mountainous topography. Climate change is generally expected to push montane species upwards (Root and Schneider 2002; Root et al. 2006) but the pattern may not be straightforward in the Himalayas. Elsen and Tingley (2015) observed that the ‘hourglass shape’ of the Himalayas causes the available surface area to increase markedly only between 3500 and 5500 m. While available surface area does not always constitute suitable habitat for species shifting ranges (Elsen and Tingley 2015), the extra surface area up to 5500 m in the Himalayas might become a potential habitat for clouded leopards and their prey. Insofar as we report a clouded leopard at 3498 m, a species thought to thrive in forest habitats, this may presage an increase in the species’ geographic range in this region.

Regarding their predatory behaviour, like the congeneric Sunda clouded leopard (Hearn et al. 2013; Hearn et al. in review), clouded leopards in Langtang National Park were least active in the middle of the day, and largely crepuscular and nocturnal, as were the common leopards and leopard cats. Insofar as coincidental activity patterns are a basis for deducing likely prey, musk deer, detected throughout the elevational gradient, are a candidate for clouded leopards and common leopards (Figs. 5 and 6), whereas wild boar, red muntjac and musk deer are candidate prey for common leopards, as might be Himalayan goral and Himalayan serow, although these occurred at higher elevations (Fig. 4).

Globally, more than half of prey species known to be eaten by large felids are either declining or threatened, and this threat of an empty ‘larder’ is particularly acute in the Indo-Malaya region (Sandom et al. 2017). Our finding of an association between the occurrence of common leopards and that of red muntjac may be suggestive of such vulnerability (Ripple et al. 2014).

Illegal trade may be a risk factor for clouded leopards (D’Cruze and Macdonald 2015; Min et al. 2018), but the role of poaching in Langtang National Park is unknown. The Nepali army and the Park Administration are working together to protect the park and to combat illegal wildlife trade, therefore these efforts may have limited poaching. Indeed, leopard cats were most prevalent where people occurred most, at lower elevation, but (in common with clouded and common leopards) were least active when people were active by day (Fig. 5i). In Sabah, leopard cats showed higher occupancy closer to roads (Mathai et al. 2017), which, elsewhere, can affect predator distribution (Zhou et al. 2013).

Elsewhere, in the Peninsula of Malaysia, our broader study found that clouded leopards occurred more in heterogeneous landscapes (Tan et al. 2017). Landscape heterogeneity, and perhaps thus the abundance and availability of prey, can change. In 2015 our fieldwork was prematurely halted, because Gorkha earthquake (Mw 7.9) triggered at least 160 landslides in Langtang valley killing at least 350 people (Lacroix 2016). A subsequent study, such as ours, could reveal whether this geological upheaval has affected the use of the landscape by clouded leopards.


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Özgün Emre Can dedicates this study to his father Professor Vedat Can who passed away during the preparation of this research article (I miss you a lot Dad). We extend our gratitude to the Department of National Parks and Wildlife Conservation of Nepal for providing permission for us to carry out the study. We thank Langtang National Park administration and Sonam Tamang, and Ramesh Basnet for participating in the fieldwork. We also thank to Dr. Maheshwar Dhakal, Hari Bhadra Acharya and Babu Ram Bhattarai for their support during this study. We also thank the Bear Research and Conservation Nepal and Surya Man Shresta, Anil Silwal, Niraj Thapa, Pasang Tamang, Nima Tamang and Minesh Ghimire. We thank World Animal Protection for providing funding for this study and Margaret Balaskas for her administrative support. We are grateful to Tuğba Can for her support during the course of the project. We thank Helen M. Bothwell and Andrew J. Hearn for providing insightful comments on an earlier draft, and Lara de Sousa for assistance with R coding.

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Can, Ö.E., Yadav, B.P., Johnson, P.J. et al. Factors affecting the occurrence and activity of clouded leopards, common leopards and leopard cats in the Himalayas. Biodivers Conserv 29, 839–851 (2020). https://doi.org/10.1007/s10531-019-01912-7

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  • Clouded leopard
  • Common leopard
  • Leopard cat
  • Jungle cat
  • Camera traps
  • Himalayas
  • Nepal